package cn.wolfcode.qo;

import lombok.Getter;

import java.util.List;
@Getter
public class PageResult<T> {
    private int currentPage; // 页面传的
    private int pageSize; // 页面传的
    private List<T> data; // 数据库查询
    private int totalCount; // 数据库查询
    private int totalPage; // 总页数
    private int prevPage; // 上一页
    private int nextPage; // 下一页

    public PageResult(int currentPage, int pageSize, List<T> data, int totalCount) {
        this.currentPage = currentPage;
        this.pageSize = pageSize;
        this.data = data;
        this.totalCount = totalCount;
        // 其他事计算出来的
       if (totalCount <= pageSize) {
            this.totalPage = 1;
            this.prevPage = 1;
            this.nextPage = 1;
            return;
        }
        this.totalPage = this.totalCount % this.pageSize == 0 ? this.totalCount
                / this.pageSize : this.totalCount / this.pageSize + 1;
        this.nextPage = this.currentPage + 1 <= this.totalPage ?
                this.currentPage + 1 : this.totalPage;
        this.prevPage = this.currentPage - 1 >= 1 ? this.currentPage - 1 : 1;
    }
}

